Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member
Before getting into the nuts and bolts of dynamics processors such as compressors, limiters, and gates, it's important to take a step back and examine some of the basics of sound. Sound is made of waves of energy that oscillate back and forth through a medium. Usually the medium is air, but sound can also travel through solids, like drywall or liquids, like water. Soundwaves create an invisible push and pull of the air particles around us and our ears perceive and translate these waves into nerve impulses that are sent to our brain.
For example, when you play music from your speakers, the speaker cone moves in and out, creating changes in the pressure of the surrounding air. The resulting soundwaves are picked up by our ears and our brain translates them into sound information. Soundwaves are generally measured across two dimensions: frequency and amplitude. Frequency is the oscillation speed of the wave of the rate of push and pull of air particles. Higher frequencies produce higher- pitched sounds, while lower frequencies create lower-pitched sounds.
While frequency and amplitude go hand in hand, in this course, we'll focus on measuring and reacting to changing a waveform's amplitude. So let's dive a little deeper into what amplitude is. When measuring the amplitude of a soundwave, we chart the changes in atmospheric pressure. When particles of air are packed together tightly, indicating higher pressure, we chart this push, or positive value on the graph, and it's called compression. Pulls are negative values in the graph where air particles are more spread out, are called rarefactions.
The height of these compressions and rarefactions in the graph indicate the amplitude, which is directly proportional to the loudness of the sound perceived; in other words, the greater the amplitude of a soundwave, the louder we will experience the sound.
Get unlimited access to all courses for just $25/month.Become a member
73 Video lessons · 16843 Viewers
130 Video lessons · 18490 Viewers
110 Video lessons · 10150 Viewers
71 Video lessons · 13866 Viewers
Access exercise files from a button right under the course name.
Search within course videos and transcripts, and jump right to the results.
Remove icons showing you already watched videos if you want to start over.
Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.
Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.
Your file was successfully uploaded.